Machine for grinding tumblers.



No. 793,408. PATENTED JUNE 27, 1905. W. F. ALTENBAUGH.

MACHINE FOR GRINDING TUMBLERS.

APPLICATION FILED JULY 7. 1904.

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No. 793,408. PATENTED JUNE 27, 1905. W. F. ALTENBAUGH.

MACHINE FOR GRINDING TUMBLERS. APPLICATION FILED JULY 7. 1904.

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PATENT OEEIGE.

MACHINE FOR GRINDING TUIVIBLERS.

SPECIFICATION forming part of Letters Patent No. 793,408, dated June 27, 1905.

Application filed July '7, 1904- Serial No. 215.658.

To all whom it may concern:

Be it known that I, VVILLIAM FRANoIs AL- TENBAUGH, a citizen of the United States, residing at Tifiin, in the county of Seneca and State of Ohio, have invented a new and useful Machine for Grinding Tumblers, of which the following is a specification.

This invention relates to machines for grinding tumblers and other articles of glassware.

The present invention is designed as an improvement upon a machine for grinding tumblers on which I received Letters Patent of the United States, dated September 1, 1903, No. 7 37,811.

The improvements constituting this invention refer more particularly to the means for presenting the work to the grinding-stone, the mechanism for driving the same, and the means for holding the work that is being ground.

The objects of the present invention are'in a simple, inexpensive, and thoroughly practical manner and with a decrease in the liability of danger of breakage or fracture to facilitate the grinding operation, to increase its rapidity, to insure exact presentation of the work to the stone and its positive holding until completed, and generally to improve and simplify the machine of the patent referred to.

With the above and other objects in view, as will appear as the nature of the invention is better'understood, the same consists in the novel construction and combination of parts of a machine for grinding tumblers and other glassware, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which like characters of reference indicate corresponding parts, there is illustrated one form of embodiment of the invention capable of carrying the same into practical operation, it being understood that the elements therein exhibited may bevaried or changed as to shape, proportion, and exact manner of assemblage without departing from the spirit thereof.

In the drawings, Figure 1 is a view in side elevation of the machine. Fig. 2 is a sectional detail view. Fig. 3 is a horizontal sectional view taken on the line 3 3, Fig. 1. Fig. 1 is an inverted plan view of the work-support. Fig. 5 is a detail View of the worksupport. Fig. 6 is an enlarged detail view of an improved steady rest employed with the present invention. Fig. 7 is a top plan view of the steady rest with certain parts removed. Fig. 8 is a collective detail view of the bottom of the steady rest.

Referring to the drawings, 1 designates the supporting-standard of the machine, which is mounted in a boss 2, carried by the base 3. Adjustably mounted upon this standard are castings 4, 5, 6, and 7. The casting 6, which constitutes one of the essential features of the present invention, is an open structure and is mounted upon the upper end of the lower section of the standard, the upper section of the standard being secured in the upper side of the casting and in alinement with the lower section. The object for making this casting hollow is to dispense with the employment of a belt for driving the grinding-wheel, as shown in the patent referred to, and this is effected by mounting a gear-wheel 8 on the upper end of the drive-shaft 9, which is journaled in suitable hearings in the casting, said gear-wheel meshing with a pinion 10, mounted upon a spindle 11, also working in suitable bearings in the casting, the lower end of the spindle being provided with a stoneholding chuck 12, as usual. The lower end of the drive-shaft 9 is mounted in a bearing in the casting 4 and carries a bevel-pinion 13, which meshes with a bevel-gear 14, carried by the drive-wheel 15, the latter being driven from any suitable source of power. (Not necessary to be shown.) By dispensing'with the belt of the patent and employing in lieu thereof the intermeshing gears 8 and 10 a more positive movement is given to the grindingstone and loss of time incident tothe breakage of the belt or the like is obviated.

Passing through the spindle 11 is a rod 16, the lower end of which carries a gripperhead 17, as usual, to bear against the bottom of the tumbler to be ground, the upper end of the rod being mounted in a bearing in the casting 7 and being held against downward movement through the medium of a collar 18,carryingaset-screw 19. The upper section of the standard carries a casting 20, through which the rod extends and is guided, and between the castings 7 and 20 there is mounted upon the rod an adjustable collar 21, between which and the under side of the casting 7 is mounted a coil-spring 22, the normal tendency of which is to force the gripper-head downward into engagement with the tumbler. As this force is constant and automatic, no attention on the part of the operator is necessary after having once been brought into proper-engagement with the tumbler.

Mounted upon the upper standard-section beneath the casting 20 is a square block 23, upon which is fulcrumed the arms of a yoke 24, the outer end of which carries a handle 25 and the inner end of which is vertically perforated to receive a threaded rod 26, the lower end of which carries a thumb-nut 27 which bears against the under side of the yoke 24, and the upper end of which has connected with it the lower end of a coiled spring 28, the upper end of which is connected in any suitable manner with the casting 7. Connec tion between the block 23 and the yoke is effected through the medium of two bolts 24, which constitute a fulcrum, and by reason of the spring 28 the outer end of the yoke, or that carrying the handle 25, is normally forced downward. This yoke carries near its outer end a pair of wheels or disks 29, which bear upon the upper face of a disk 30, mounted upon the stone-carrying spindle 11. From this it will be seen that through the spring 28 the disks 29 are caused always to exert a downward pressure to the disk 30, and thus cause the latter to force the spindle down ward and bring the disk grinding-stone into positive contact with the upper edge or mouth of the tumbler or other article to be ground.

Another part of the present invention that forms an essential feature thereof resides in the novel form of Work-support, which is adapted to contain a number of articles at one time and is so arranged as to permit of the articles to be broughtrapidly and with exactness beneath the grinding-wheel. This part of the invention is clearly shown in Figs. 1, 3, 4, and 5.

Mounted in the castings 4 and 5 is a rod 31, the upper end of which projects through the casting 5 and has secured to it a casting 32, formed with a hollow boss 33. The casting 32 carries the work-support, comprising a disk 34, having at its center a teat 35 to engage the boss 33 of the casting 32. Thedisk is provided at its periphery with three stops 36, spaced at equal distances apart and are adapted to be engaged by a pawl 37 pivoted at 38 upon the casting, a spring 39, secured to the pawl and to the casting beneath the disk, serving to cause the pawl normally to bear against the periphery of the disk.

Mounted upon the upper face of the disk and spaced at equal distance apart are three steady rests, each comprising a base-ring 40, a shell or body 41, and a plurality of arms 42. The base-rings are provided with perforated ears 43, through which pass bolts 44 to secure the rings to the work-support. Each shell 41 is secured in any preferred manner in its base-ring and is externally and internally threaded, as clearly shown in Fig. 6. The upper portion of each shell is provided with three pairs of ears 45, between which the arms 42 are pivoted, the ears being by, pref-- erence integral with the shell. The upper ends of the arms are curved inward and extend some distance above the shell, and the lower ends of the arms curve outward away from the shell. Engaging the exterior threads of the shell is an adjusting-ring 46, which, as will be seen, by being turned up upon the shell will force the upper ends of the arms inward to cause them to caliper or grasp relatively small objects, while by turning the ring down upon the shell the upper ends of the arms are moved outward, and thus caused to caliper relatively large objects. The internal threads of the shell are engaged by a bottom 47, which is provided with openings 48, in which the fingers of the operator may be inserted for adjusting the bottom as may be desired. This work-support will be found of the highest efficiency in use, as by its employment three times the amount of work usually accomplished can be done, for the reason that an operator can be supplying one of the steady rests with an article to be ground while another one is undergoing grinding, and so on. The means for raising the work-support from the grind ing-stone may be lazy-tongs 49, which operate in the same manner as that described in the patent referred to, and as it forms no part of the present invention detail description thereof is deemed unnecessary.

From the foregoing description it will be seen that the improvements of the present invention, while comparatively simple in character, will be found of the highest value and importance in the art, not only by reason of the fact that work is expedited, but greater accuracy is secured in grinding. Moreover, by'the employment of the steady rests and work-holding arms the range of usefulness of the apparatus is extended beyond that of a mere tumbler-grinder, as other than symmetrical forms may be securely held and operated upon.

Having thus described the invention, what is claimed is 1. In a machine for grinding tumblers, a rotatable work-support, and a plurality of steady rests carried thereby each comprising adjustable arms for clamping the object to the ground, and an adjustable bottom rest.

2. In a machine for grinding tumblers, a rotatable work-support, means for holding it at any desired adjustment, and a plurality of steady rests carried thereby, and comprising adjustable arms for clamping the object to be ground. I

3. In amachine for grinding tumblers, a rotatable work-sup port, and a plurality of steady rests carried thereby each comprising an exteriorly and interiorly threaded shell, arms pivotally connected with the exterior of the shell, an arm-adjusting ring engaging the exterior threads, and an adjustable bottom engaging the interior threads.

4. In a machine for grinding tumblers, a spindle, a grinding-stone carried by the lower end thereof, a disk carried by the upper end thereof, a pivoted yoke carrying wheels engaging the upper side of the disk. and means for regulating the pressure between the disk and wheels.

5. In a machine for grinding tumblers, the combination with a standard, of an open-work head mounted thereon, a shaft and a spindle journaled in the head, a gear-wheel carried bythe shaft and meshing with a pinion carried by the spindle, and a grinding-stone carried by the spindle.

6. In a machine for grinding tumblers, a stone-carrying spindle provided at its upper end with a disk, a yoke pivoted intermediate of its ends, and carrying near one extremity a pair of disks to engage the upper side of the disk, and an adjustable tension-spring connected with the yoke.

7. In a machine for grinding tumblers, the combination with a standard, of a casting supported thereby and provided with a hollow boss, a work-support having 2. lug to engage the boss, steady rests carried by the worksupport, and means for locking the work-support at any desired adjustment.

8. A machine for grinding tumblers, an open-work head, a two-part standard connected therewith, a shaft and a spindlejournaled in the head, a gear-wheel carried by the shaft and meshing with the pinion carried by the spindle, a grinding-stone carried by the spindle, a disk carried by the upper end of the spindle, a yoke pivotally connected with the upper section of the standard and carrying wheels to engage the disk, and means for regulating the pressure between the disk and wheels. i

In'testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

WILLIAM FRANCIS ALTENBAUGII.

Witnesses:

PHIL. E. BAUME, EMERY A. SPURRIER. 

